David h



DAVID H. sTIoKNEY, or CINCINNATI, oHIo.

COCK.

spcification of Letters Patent No. 25,853, dated october is, 1859.

To all whom it 'may comem:

Be it known that I, DAVID H. STIGKNEY of Cincinnati, Hamilton count State o Ohio, have invented a new an Improved Cock or Faucet; and I hereby declare the following tobe a full, clear, and exact de scription of the same, reference being had to the accompanying drawings, making part of this specification.

The present improvement urefers to the class of cocks or faucets which open by simply depressing a hollow piston and which close by the interior pressure; and' the invention consists'chieiy in a provision for the eective lubrication of the packing around the piston by means of -the discharging fluid itself. 'l In the accompanying drawings, is aside elevation.= Figs. 2 and. 3 are axial sections giving the closed and open positions respectively. Fig. 4 is an axial section exhiblting the invention as applied to a gage cock for steam boilers.

The cap B which closes the stuiiing box C of the barrel A is prolonged upward so as to form around the piston E an annular space or chamber D whose length slightly exceedsthe desired range of said piston. The space D may be closed at top by a suitable screw cap F. l The piston E consists of a cylindrical tube closed at its ends and provided at top with a knob J adapted for pressure of the hand, at orJnear its upper end with a discharge nozzle H, near its lower end with inlets Gr, and at about its mid-len th with a collarl, which limits the play lo the pi'ston and in applications where it is needful may be adapted to form a tight joint in connection with the inner surface of the cap-F, when the piston is in its outer position.

The act of opening the cock, consists sim-A i ply in pressing in the piston as in Fig. 3, the y iluid entering from the barrel A in opposite position so nication with and equal streams which balance each other so as to avoid any side pressure or wear. On the withdrawall of the. hand thepressure of f iuid within as'to remove the inlets JGr from and'to bring them into commuthe chamber Dfwhich is thus the supply,

Figure `l restores the piston to itsouterJ constantly charged with moisture. A. of fluid `.being thus provided outsideJ as is kept constantly Ihoist and watertight, and the piston constantly lubricated.

In-Fig. 4 the invention is represented as applied to a gage cock for locomotive and other steam boilers. In this case the piston E is provided near its outer end with a simple aperture g, in the piston so as to open the cock is brought into 'uXtaposition with a nozzle H which is fixed in the cap B( At this time the steam or water passing from the barrel A through the aperture G is discharged downward through which in the act of pressing the apertures g and nozzle H. Upon the piston returning to its outer position a portion of the fluid escapes through the apertures G into tht chamber' D and keeps the packing in a moist and lubricated condition.

This cock is simple in its construction and is found to continue eective for a very long period, which ispaitially due to the fact' that the surfaces of the passages are notdeended upon to produce steam or watertight .Joints The apertures are entirelyisolated from the packing except for4 an instant during the act of openingor closing the cock; by which means the softening and destruction of the packing and the consequent choking of the passages are in a great measure avoided. A cock of this construction is also exempt from liability to open by the jar or shaking of machinery. At every motion of the piston, lime from its surface by the packing. By the use of a hollow piston. whose perforations may be placed on either side of a stationary stuifinfr box in the mannerexplained, a singleV patcking is adapted to perform functions which would otherwise require twoz-one of which must be exposed to atmospheric iniuence.

I claim as new and of my invention and desire to secure by Letters Patent-a The supplementary chamber D and stationary stufnggbox C, in 'combination with a hollow piston having ingress Aapertures G, adapted to be placed on.either side of the said stuing boxby the motion of the piston as set forth.

In testimony of which invention, I hereunto set my hand.

D. H. STICKNEY. Witnessesz j GEO. H. KNIGHT,

C. Sramana., Jr.

or other sediment is wiped 

